Apparatus for projection of molten pulverized bodies



Feb: 13, 1940'. F. P. c. BENOIT 2,1 0,

APPARATUS FOR PROJECTION 0F MOLTEN PULVERIZED' BODIES Filed July 15.1936 Flg. 1 6% 5 65 INVENTOR ME WWW ATTORNEYS Patented Feb. l3, 1940PATENT OFFICE APPARATUS I'OB PROJECTION,,OF MOL'I'EN PULVEBIZED BODIESCharles Benoit, Paris, France I Application July 15, 1930, Serial No.90,861 In FranceFebrnary 19, 1936 IOiaim.

The present invention relates to apparatus for the projection of mattersin the atomized and molten state oi the type described in the U. 8.Patents No. 1,998,217 and No. 2,072,845 and the 5 siaggtent applicationSer. No. 45,772 of October The object of the present invention is toprovide an apparatus of the type above described in which the inflow ofcompressed air is automatically controlled and this air is distributedin the proper manner.

A preferred embodiment of the presentinvention will be hereinafterdescribed, with reference to the accompanying drawing, given merely byis way oi example, and in which:

,Fig. 1 is an axial sectional view of the device for controlling thedistribution of the fluid under V pressure, and

Fig. 2 is a diagrammatical view illustrating the combination of a spraygun and an operating apparatus associated therewith.

In Fig. 2, reference character 'I designates the spray gun including theburner, and 4 is the tube for the feed of the fluid serving to conveythe powdery matters. The three-way cock shown at 6 at the lower part ofthe handle of the spray gun permits, through a'single control member, ofadmitting, inthe-desiredorder: (l) the gas for supporting combustion,oxygen for instance, which is fed through connection I; (2)

the combustible gas, acetylene for instance, which is fed throughcoupling 9; and, (3) the compressed fluid, which is fed through couplingII, and flows through the aperture of thedome of cock 6, as described inthe U. S. Patent 2,072,845

and is led to the burner through tube II.

The cock for controlling the fluids admitted into the burner, visible at6 in Fig. 1, does not differ, in its construction, from that described40 in U. S. patent application No. 2,072,845, but, in this case, it isfltted in such manner that the compressed fluid for cooling the head ofthe burner, forp'roducing a supplementary suction and for projecting thepowdery matters passes directly through the dome of the cock, while inthe construction disclosed in this prior application it was the fluidserving to convey the powdery matters that flew through this dome.

This last mentioned fluid is fed through tube fluid supplies directly,on the one hand coupling I I and, on the other hand the apparatus forplacing the powdery matters into suspension in said fluid. After issuingfrom this last mentioned 4 (Fig. 2), but the same source of compressedapparatus, the mixture of fluid and powder is admitted through 4 intothe spray gun.

nected to the coupling of the body ii 01' the apparatus, whichconstitutes a distributing device. The fluid for cooling the burner,exerting a supplementary suction action and projecting 1o the powderymatters escapes at 62 through a conduit which leads at H to the cock 6of the spray gun. The fluid necessaryfor bringing the powdery mattersinto suspension therein and conveying them to the burner flows outthrough 15 coupling 63. Therefore coupling 63 is connected with thepowder reservoir. After mixture with the powder in said reservoir, thefluid is fed to the spray gun through conduit 4.

The body il (Fig. 1) is closed by a lid 64 20 through which an elasticmembrane 66 is fixed at 65. This flexible partition is provided, in itscentral part, with a hole 6'! through which extends a cylindrical rod68, the lower part 69 of which is of conical shape. Between this coni-25,

cal part 69 and the metallic fitting '10 of the aperture 51, there isleft a slight play II. This play or clearance space can be adjusted byscrewing rod I2 in lid 54-.

On the other hand, the elastic membrane 66 30 supports, through rods .14and cross member 15, a valve 16 which stops the passage toward coupling63.

If it is supposed that the cock 6 of the spray gun is in the closedposition, fluid cannot flow 35 out through coupling 62. The pressure ofconduit 60 is transmitted to the space below membrane and also to thespace above said membrane, owing to the leakage through space II.

This pressure applies valve 15 against its seat 40 and fluid cannot flowout toward the powder reservoir.

But if the cock 6 of the spray gun is opened, the fluid under pressurecan escape through 62. Passage II is not suflicient for keeping thepressure above the membrane, so that the latter is deformed, its centralpart being lifted, so as to open valve I6 through rods 14. Fluid canthen flow out toward the powder reservoir through 50 coupling 63.

It will be noted that the various parts of the device are adjustable,the area of passage ll being variable owing to the threaded part of rod12, which passes, on the other hand, through a 55 packing system [1, andthe upward movement of valve 16 being variable through screw 18.

Owing to this device, cock 8 controls the flow of all the fluids thatare called into play in the working of the spray'gun. It ensures theopening or the closing or their conduits automatically in the desiredorder. I i

In a general way, while I have, in the above description, disclosed whatI deem to be a practical and eiiicient embodiment of the presentinvention, it should be wellunderstood that 1- do not wish to be limitedthereto as there might be changes made in the arrangement, dispositionand form of the parts without departing from the principle of thepresent invention as comprehended within the scope of the appended'claim.

powden and spraying the resulting molten matter in an atomized state, acasing, an elastic partition in said casing ior dividing it into twochambers, an inlet for said fluid under pressure opening into one ofsaid chambers, an outlet for said fluid connected with said lastmentioned chamber, said elastic partition being provided with anadjustable aperture of restricted, section, means carried by saidpartition for controlling said outlet so as to open itwhen thepressurein said last mentioned chamber is higher than in the other chamber, andan outlet connected with said other. chamber adapted to be connectedwith said means for feeding a fluid under pressure to said burner, thefirst mentioned outlet serving to the outflow of the fluid intended tohold the powder in suspension therein;

mmcors 9mm CHARLES Barron.

